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Do you happen to know the location of where they had attemped to forcfully rip/yank on the wiring?
The only problem is that when at 65+ mph the engine would stall, can you tell me if then it would strat right back up or would it not start at all?
When it would stall would it just die like you turned the key off or would it cough and stuble with no acelleration?
When you state it will not start now how long has the time frame been from when the problem first started?
When it does not start if you turn the key on do the dash lights come on?
If they do and you try to start do you hear a clicking or a clunk or nothing at all?
Is this a manual or auto transmission?